Macrocyclic polyetherimide oligomer compositions are prepared by a displacement reaction at a temperature in the range of about 200-225°C between at least one fluorinated aromatic phthalimide and at least one phenolic trialkylsilyl ether compound. Preferably, a bis-fluoroimide and a bis-trialkylsilyl ether of a dihydroxyaromatic compound such as resorcinol are employed. The reaction is conducted by maintaining reagents A and B in high dilution in a dipolar aprotic organic liquid such as N-methylpyrrolidone, and in the presence of a catalytic amount of at least one substantially soluble fluoride. Preferably, a mixture of reagents A and B is added to solvent containing the catalyst.
大环聚醚
酰亚胺低聚物组合物是由至少一种
氟化芳香族邻苯二甲
酰亚胺和至少一种
酚三烷基
硅醚化合物在约 200-225°C 的温度范围内进行置换反应制备的。最好使用双
氟亚胺和二羟芳香族化合物(如
间苯二酚)的双三烷基
硅醚。反应是通过将试剂 A 和 B 保持在高度稀释的双极性无
水有机液体(如
N-甲基吡咯烷酮)中,并在催化量的至少一种基本上可溶的
氟化物存在下进行的。最好将试剂 A 和 B 的混合物加入含有催化剂的溶剂中。